Answer:
Its speed decreases.
Explanation:
When light enters into water, its speed decreases (as well as its frequency). This is the reason why refraction (the bending of light when it changes media) occurs.
This can be proven mathematically.
Given that the refractive index of water is 4/3, we know that refractive index is the ratio of the speed of light in a vacuum to the speed of light in another medium.
Therefore,
4/3 = (speed of light in vacuum) / (speed of light in water)
Speed of light in a vacuum is 3 * 10^8. Hence,
Speed of light in water is:
v = (3 * 10^8) / (4/3)
v = 2.25 * 10^8 m/s
As we can see, the speed of light decreases in water.
Extra innings is the answer
Answer:
Explanation:
Polarization In this case angle of incidence is not equal to angle of polarization, hence reflected light is partially polarized and transmitted light is also partially polarized. by reflection is explained by Brewster's law,
According to this when unpolarized light incident on glass plate at an angle is called as angle of polarizing the reflected light is plane polarized, and transmitted light is partially polarized. The plane of vibration of polarized light is having plane of vibrations perpendicular to plane of incidence.
Answer:
i do agree to my friend
Explanation:
White light is absorbed by the callours that are not white. if it was white it would of been reflected. The light also helps us to see the object i.e the grass as the light is shining on it.
i hope your happy :)
<h2>
Magnitude of average force is 751.52 N</h2>
Explanation:
By Newtons second law force is rate of change of momentum.
Initial momentum = Mass x initial velocity
Mass = 58.5 g = 0.0585 kg
Initial velocity = +25 m/s
Initial momentum = 0.0585 x 25 = 1.4625 kgm/s
Final momentum = Mass x Final velocity
Mass = 58.5 g = 0.0585 kg
Final velocity = -22.5 m/s
Final momentum = 0.0585 x -22.5 = -1.3163 kgm/s
Change of momentum = Initial momentum - Final momentum = 1.4625 - (-1.3163)
Change of momentum = 2.48 kgm/s
Time = 3.33 ms = 0.0033 s
Magnitude of average force is 751.52 N
